crypto: migrate to SPDX identifier

[jerpelea]

Summary

Most tools used for compliance and SBOM generation use SPDX identifiers This change brings us a step closer to an easy SBOM generation.

Please note that there are licenses that have no SPDX identification

Impact

SBOM

Testing

CI

[jerpelea]

@xiaoxiang781216 please help identify the license for the files identified with ???

[xiaoxiang781216]

@xiaoxiang781216 please help identify the license for the files identified with ???

@ThePassionate please take a look.

[jerpelea]

@xiaoxiang781216 please provide the information

[jerpelea]

I removed all unclear licenses. Please merge the PR and I will start discussion on dev mailing list

[jerpelea]

Thank you folks great job! :-)

Btw isn't OpenBSD a BSD license? :-) :-)

the license is BSD when the license is stated BSD